+2005-12-08 Steven Munroe <sjmunroe@us.ibm.com>
+ Tom Gall <tom_gall@vnet.ibm.com>
+
+ * elf/rtld.c (dl_main): Initialize l_local_scope for sysinfo_map.
+ * sysdeps/powerpc/elf/libc-start.c: Move this...
+ * sysdeps/unix/sysv/linux/powerpc/libc-start.c: ...to here.
+ * sysdeps/powerpc/powerpc32/dl-start.S: Add _dl_main_dispatch label.
+ * sysdeps/powerpc/powerpc32/hp-timing.h: New file.
+ * sysdeps/unix/sysv/linux/powerpc/Versions: New file.
+ * sysdeps/unix/sysv/linux/clock_getres.c: If HAVE_CLOCK_GETRES_VSYSCALL
+ is not defined, redefine INTERNAL_VSYSCALL and INLINE_VSYSCALL to
+ INTERNAL_SYSCALL and INLINE_SYSCALL respectively. Otherwise include
+ <bits/libc-vdso.h>. Use INLINE_VSYSCALL and INTERNAL_SYSCALL instead
+ of the normal versions throughout the code.
+ * sysdeps/unix/sysv/linux/clock_gettime.c: Likewise if
+ HAVE_CLOCK_GETTIME_VSYSCALL is defined.
+ * sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h: New file.
+ * sysdeps/unix/sysv/linux/powerpc/dl-vdso.c: New file.
+ * sysdeps/unix/sysv/linux/powerpc/dl-vdso.h: New file.
+ * sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c: Use vDSO.
+ * sysdeps/unix/sysv/linux/powerpc/gettimeofday.c: New file.
+ * sysdeps/unix/sysv/linux/powerpc/Makefile: Add dl-vdso to routines.
+ * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Define
+ INLINE_VSYSCALL, INTERNAL_VSYSCALL, INTERNAL_SYSCALL_NCS,
+ INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK, HAVE_CLOCK_GETRES_VSYSCALL,
+ and HAVE_CLOCK_GETTIME_VSYSCALL.
+ * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise.
+
2005-12-29 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h [ASSEMBLER]:
_dl_setup_hash (l);
l->l_relocated = 1;
+ /* Initialize l_local_scope to contain just this map. This allows
+ the use of dl_lookup_symbol_x to resolve symbols within the vdso.
+ So we create a single entry list pointing to l_real as its only
+ element */
+ l->l_local_scope[0]->r_nlist = 1;
+ l->l_local_scope[0]->r_list = &l->l_real;
+
/* Now that we have the info handy, use the DSO image's soname
so this object can be looked up by name. Note that we do not
set l_name here. That field gives the file name of the DSO,
/* Machine-dependent ELF startup code. PowerPC version.
- Copyright (C) 1995-2000, 2002, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1995-2000, 2002, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Take the opportunity to clear LR, so anyone who accidentally returns
from _start gets SEGV. Also clear the next few words of the stack. */
+ENTRY(_dl_main_dispatch)
li r31,0
stw r31,0(r1)
mtlr r31
--- /dev/null
+/* High precision, low overhead timing functions. Linux/PPC32 version.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _HP_TIMING_H
+#define _HP_TIMING_H 1
+
+
+/* There are no generic definitions for the times. We could write something
+ using the `gettimeofday' system call where available but the overhead of
+ the system call might be too high.
+
+ In case a platform supports timers in the hardware the following macros
+ and types must be defined:
+
+ - HP_TIMING_AVAIL: test for availability.
+
+ - HP_TIMING_INLINE: this macro is non-zero if the functionality is not
+ implemented using function calls but instead uses some inlined code
+ which might simply consist of a few assembler instructions. We have to
+ know this since we might want to use the macros here in places where we
+ cannot make function calls.
+
+ - hp_timing_t: This is the type for variables used to store the time
+ values.
+
+ - HP_TIMING_ZERO: clear `hp_timing_t' object.
+
+ - HP_TIMING_NOW: place timestamp for current time in variable given as
+ parameter.
+
+ - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the
+ HP_TIMING_DIFF macro.
+
+ - HP_TIMING_DIFF: compute difference between two times and store it
+ in a third. Source and destination might overlap.
+
+ - HP_TIMING_ACCUM: add time difference to another variable. This might
+ be a bit more complicated to implement for some platforms as the
+ operation should be thread-safe and 64bit arithmetic on 32bit platforms
+ is not.
+
+ - HP_TIMING_ACCUM_NT: this is the variant for situations where we know
+ there are no threads involved.
+
+ - HP_TIMING_PRINT: write decimal representation of the timing value into
+ the given string. This operation need not be inline even though
+ HP_TIMING_INLINE is specified.
+
+*/
+
+/* Provide dummy definitions. */
+#define HP_TIMING_AVAIL (0)
+#define HP_TIMING_INLINE (0)
+typedef unsigned long long int hp_timing_t;
+#define HP_TIMING_ZERO(Var)
+#define HP_TIMING_NOW(var)
+#define HP_TIMING_DIFF_INIT()
+#define HP_TIMING_DIFF(Diff, Start, End)
+#define HP_TIMING_ACCUM(Sum, Diff)
+#define HP_TIMING_ACCUM_NT(Sum, Diff)
+#define HP_TIMING_PRINT(Buf, Len, Val)
+
+/* Since this implementation is not available we tell the user about it. */
+#define HP_TIMING_NONAVAIL 1
+
+#endif /* hp-timing.h */
/* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#include "kernel-features.h"
+#ifndef HAVE_CLOCK_GETRES_VSYSCALL
+# undef INTERNAL_VSYSCALL
+# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
+# undef INLINE_VSYSCALL
+# define INLINE_VSYSCALL INLINE_SYSCALL
+#else
+# include <bits/libc-vdso.h>
+#endif
#define SYSCALL_GETRES \
- retval = INLINE_SYSCALL (clock_getres, 2, clock_id, res); \
+ retval = INLINE_VSYSCALL (clock_getres, 2, clock_id, res); \
break
#ifdef __ASSUME_POSIX_TIMERS
if (!__libc_missing_posix_timers)
{
INTERNAL_SYSCALL_DECL (err);
- int r = INTERNAL_SYSCALL (clock_getres, err, 2, clock_id, res);
+ int r = INTERNAL_VSYSCALL (clock_getres, err, 2, clock_id, res);
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
return 0;
if (!__libc_missing_posix_cpu_timers)
{
INTERNAL_SYSCALL_DECL (err);
- int r = INTERNAL_SYSCALL (clock_getres, err, 2, clock_id, res);
+ int r = INTERNAL_VSYSCALL (clock_getres, err, 2, clock_id, res);
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
return 0;
{
/* Check whether the kernel supports CPU clocks at all.
If not, record it for the future. */
- r = INTERNAL_SYSCALL (clock_getres, err, 2,
+ r = INTERNAL_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
/* clock_gettime -- Get current time from a POSIX clockid_t. Linux version.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#include "kernel-posix-cpu-timers.h"
#include "kernel-features.h"
+#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
+# undef INTERNAL_VSYSCALL
+# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
+# undef INLINE_VSYSCALL
+# define INLINE_VSYSCALL INLINE_SYSCALL
+#else
+# include <bits/libc-vdso.h>
+#endif
#define SYSCALL_GETTIME \
- retval = INLINE_SYSCALL (clock_gettime, 2, clock_id, tp); \
+ retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp); \
break
#ifdef __ASSUME_POSIX_TIMERS
if (!__libc_missing_posix_timers)
{
INTERNAL_SYSCALL_DECL (err);
- int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp);
+ int r = INTERNAL_VSYSCALL (clock_gettime, err, 2, clock_id, tp);
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
return 0;
if (!__libc_missing_posix_cpu_timers)
{
INTERNAL_SYSCALL_DECL (err);
- int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp);
+ int r = INTERNAL_VSYSCALL (clock_gettime, err, 2, clock_id, tp);
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
return 0;
{
/* Check whether the kernel supports CPU clocks at all.
If not, record it for the future. */
- r = INTERNAL_SYSCALL (clock_getres, err, 2,
+ r = INTERNAL_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
ifeq ($(subdir),stdlib)
gen-as-const-headers += ucontext_i.sym
endif
+
+ifeq ($(subdir),elf)
+routines += dl-vdso
+endif
--- /dev/null
+libc {
+ GLIBC_PRIVATE {
+ __vdso_get_tbfreq;
+ __vdso_clock_gettime;
+ __vdso_clock_getres;
+ }
+}
--- /dev/null
+/* Resolve function pointers to VDSO functions.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+
+#ifndef _LIBC_VDSO_H
+#define _LIBC_VDSO_H
+
+#ifdef SHARED
+
+extern void *__vdso_gettimeofday;
+
+extern void *__vdso_clock_gettime;
+
+extern void *__vdso_clock_getres;
+
+extern void *__vdso_get_tbfreq;
+
+#endif
+
+#endif /* _LIBC_VDSO_H */
--- /dev/null
+/* ELF symbol resolve functions for VDSO objects.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include "config.h"
+#include <dl-hash.h>
+#include <ldsodefs.h>
+
+
+void *
+internal_function
+_dl_vdso_vsym (const char *name, const char *version)
+{
+ struct link_map *map = GLRO (dl_sysinfo_map);
+ void *value = NULL;
+
+
+ if (map != NULL)
+ {
+ /* Use a WEAK REF so we don't error out if the symbol is not found. */
+ ElfW (Sym) wsym;
+ memset (&wsym, 0, sizeof (ElfW (Sym)));
+ wsym.st_info = (unsigned char) ELFW (ST_INFO (STB_WEAK, STT_NOTYPE));
+
+ /* Compute hash value to the version string. */
+ struct r_found_version vers;
+ vers.name = version;
+ vers.hidden = 1;
+ vers.hash = _dl_elf_hash (version);
+ /* We don't have a specific file where the symbol can be found. */
+ vers.filename = NULL;
+
+ /* Search the scope of the vdso map. */
+ const ElfW (Sym) *ref = &wsym;
+ lookup_t result = GLRO (dl_lookup_symbol_x) (name, map, &ref,
+ map->l_local_scope,
+ &vers, 0, 0, NULL);
+
+ if (ref != NULL)
+ value = DL_SYMBOL_ADDRESS (result, ref);
+ }
+
+ return value;
+}
--- /dev/null
+/* ELF symbol resolve functions for VDSO objects.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _DL_VDSO_H
+#define _DL_VDSO_H 1
+
+/* Functions for resolving symbols in the VDSO link map. */
+extern void *_dl_vdso_vsym (const char *name, const char *version)
+ internal_function attribute_hidden;
+
+#endif /* dl-vdso.h */
#include <string.h>
#include <unistd.h>
#include <libc-internal.h>
-
+#include <sysdep.h>
+#include <bits/libc-vdso.h>
hp_timing_t
__get_clockfreq (void)
{
/* We read the information from the /proc filesystem. /proc/cpuinfo
contains at least one line like:
- timebase : 33333333
+ timebase : 33333333
We search for this line and convert the number into an integer. */
static hp_timing_t timebase_freq;
hp_timing_t result = 0L;
if (timebase_freq != 0)
return timebase_freq;
- int fd = open ("/proc/cpuinfo", O_RDONLY);
- if (__builtin_expect (fd != -1, 1))
+ /* If we can use the vDSO to obtain the timebase even better. */
+#ifdef SHARED
+ INTERNAL_SYSCALL_DECL (err);
+ timebase_freq = INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK (get_tbfreq, err, 0);
+ if (INTERNAL_SYSCALL_ERROR_P (timebase_freq, err)
+ && INTERNAL_SYSCALL_ERRNO (timebase_freq, err) == ENOSYS)
+#endif
{
- /* The timebase will be in the 1st 1024 bytes for systems with up
- to 8 processors. If the first read returns less then 1024
- bytes read, we have the whole cpuinfo and can start the scan.
- Otherwise we will have to read more to insure we have the
- timebase value in the scan. */
- char buf[1024];
- ssize_t n;
+ int fd = open ("/proc/cpuinfo", O_RDONLY);
- n = read (fd, buf, sizeof (buf));
- if (n == sizeof (buf))
+ if (__builtin_expect (fd != -1, 1))
{
- /* We are here because the 1st read returned exactly sizeof
- (buf) bytes. This implies that we are not at EOF and may
- not have read the timebase value yet. So we need to read
- more bytes until we know we have EOF. We copy the lower
- half of buf to the upper half and read sizeof (buf)/2
- bytes into the lower half of buf and repeat until we
- reach EOF. We can assume that the timebase will be in
- the last 512 bytes of cpuinfo, so two 512 byte half_bufs
- will be sufficient to contain the timebase and will
- handle the case where the timebase spans the half_buf
- boundry. */
- const ssize_t half_buf = sizeof (buf) / 2;
- while (n >= half_buf)
+ /* The timebase will be in the 1st 1024 bytes for systems with up
+ to 8 processors. If the first read returns less then 1024
+ bytes read, we have the whole cpuinfo and can start the scan.
+ Otherwise we will have to read more to insure we have the
+ timebase value in the scan. */
+ char buf[1024];
+ ssize_t n;
+
+ n = read (fd, buf, sizeof (buf));
+ if (n == sizeof (buf))
{
- memcpy (buf, buf + half_buf, half_buf);
- n = read (fd, buf + half_buf, half_buf);
+ /* We are here because the 1st read returned exactly sizeof
+ (buf) bytes. This implies that we are not at EOF and may
+ not have read the timebase value yet. So we need to read
+ more bytes until we know we have EOF. We copy the lower
+ half of buf to the upper half and read sizeof (buf)/2
+ bytes into the lower half of buf and repeat until we
+ reach EOF. We can assume that the timebase will be in
+ the last 512 bytes of cpuinfo, so two 512 byte half_bufs
+ will be sufficient to contain the timebase and will
+ handle the case where the timebase spans the half_buf
+ boundry. */
+ const ssize_t half_buf = sizeof (buf) / 2;
+ while (n >= half_buf)
+ {
+ memcpy (buf, buf + half_buf, half_buf);
+ n = read (fd, buf + half_buf, half_buf);
+ }
+ if (n >= 0)
+ n += half_buf;
}
- if (n >= 0)
- n += half_buf;
- }
-
- if (__builtin_expect (n, 1) > 0)
- {
- char *mhz = memmem (buf, n, "timebase", 7);
- if (__builtin_expect (mhz != NULL, 1))
+ if (__builtin_expect (n, 1) > 0)
{
- char *endp = buf + n;
-
- /* Search for the beginning of the string. */
- while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n')
- ++mhz;
+ char *mhz = memmem (buf, n, "timebase", 7);
- while (mhz < endp && *mhz != '\n')
+ if (__builtin_expect (mhz != NULL, 1))
{
- if (*mhz >= '0' && *mhz <= '9')
+ char *endp = buf + n;
+
+ /* Search for the beginning of the string. */
+ while (mhz < endp && (*mhz < '0' || *mhz > '9')
+ && *mhz != '\n')
+ ++mhz;
+
+ while (mhz < endp && *mhz != '\n')
{
- result *= 10;
- result += *mhz - '0';
- }
+ if (*mhz >= '0' && *mhz <= '9')
+ {
+ result *= 10;
+ result += *mhz - '0';
+ }
- ++mhz;
+ ++mhz;
+ }
}
+ timebase_freq = result;
}
- timebase_freq = result;
+ close (fd);
}
- close (fd);
}
return timebase_freq;
--- /dev/null
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#include <bp-checks.h>
+#include <stddef.h>
+#include <sys/time.h>
+#include <time.h>
+#include <hp-timing.h>
+
+#undef __gettimeofday
+#include <bits/libc-vdso.h>
+
+/* Get the current time of day and timezone information,
+ putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled.
+ Returns 0 on success, -1 on errors. */
+
+int
+__gettimeofday (tv, tz)
+ struct timeval *tv;
+ struct timezone *tz;
+{
+ return INLINE_VSYSCALL (gettimeofday, 2, CHECK_1 (tv), CHECK_1 (tz));
+}
+
+INTDEF (__gettimeofday)
+weak_alias (__gettimeofday, gettimeofday)
-/* Copyright (C) 1998,2000-2004,2005 Free Software Foundation, Inc.
+/* Copyright (C) 1998,2000,2001,2002,2003,2004,2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
extern int __cache_line_size;
weak_extern (__cache_line_size)
-
/* The main work is done in the generic function. */
#define LIBC_START_MAIN generic_start_main
#define LIBC_START_DISABLE_INLINE
#define LIBC_START_MAIN_AUXVEC_ARG
#define MAIN_AUXVEC_ARG
+#define INIT_MAIN_ARGS
#include <csu/libc-start.c>
-
struct startup_info
-{
- void *__unbounded sda_base;
- int (*main) (int, char **, char **, void *);
- int (*init) (int, char **, char **, void *);
- void (*fini) (void);
-};
+ {
+ void *__unbounded sda_base;
+ int (*main) (int, char **, char **, void *);
+ int (*init) (int, char **, char **, void *);
+ void (*fini) (void);
+ };
+
+
+#ifdef SHARED
+# include <sys/time.h>
+# include <dl-vdso.h>
+# undef __gettimeofday
+# undef __clock_gettime
+# undef __clock_getres
+# include <bits/libc-vdso.h>
+
+void *__vdso_gettimeofday;
+void *__vdso_clock_gettime;
+void *__vdso_clock_getres;
+void *__vdso_get_tbfreq;
+static inline void _libc_vdso_platform_setup (void)
+ {
+ __vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday",
+ "LINUX_2.6.15");
+
+ __vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime",
+ "LINUX_2.6.15");
+
+ __vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres",
+ "LINUX_2.6.15");
+
+ __vdso_get_tbfreq = _dl_vdso_vsym ("__kernel_vdso_get_tbfreq",
+ "LINUX_2.6.15");
+ }
+#endif
int
/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
BPs in the arglist of startup_info.main and startup_info.init. */
-BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
- char *__unbounded *__unbounded ubp_ev,
- ElfW(auxv_t) *__unbounded auxvec,
- void (*rtld_fini) (void),
- struct startup_info *__unbounded stinfo,
- char *__unbounded *__unbounded stack_on_entry)
+ BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
+ char *__unbounded *__unbounded ubp_ev,
+ ElfW (auxv_t) * __unbounded auxvec,
+ void (*rtld_fini) (void),
+ struct startup_info *__unbounded stinfo,
+ char *__unbounded *__unbounded stack_on_entry)
{
#if __BOUNDED_POINTERS__
char **argv;
/* the PPC SVR4 ABI says that the top thing on the stack will
be a NULL pointer, so if not we assume that we're being called
- as a statically-linked program by Linux... */
+ as a statically-linked program by Linux... */
if (*stack_on_entry != NULL)
{
- char *__unbounded *__unbounded temp;
+ char *__unbounded * __unbounded temp;
/* ...in which case, we have argc as the top thing on the
- stack, followed by argv (NULL-terminated), envp (likewise),
- and the auxilary vector. */
+ stack, followed by argv (NULL-terminated), envp (likewise),
+ and the auxilary vector. */
/* 32/64-bit agnostic load from stack */
argc = *(long int *__unbounded) stack_on_entry;
ubp_av = stack_on_entry + 1;
#ifdef HAVE_AUX_VECTOR
temp = ubp_ev;
while (*temp != NULL)
- ++temp;
- auxvec = (ElfW(auxv_t) *)++temp;
+ ++temp;
+ auxvec = (ElfW (auxv_t) *)++ temp;
#endif
rtld_fini = NULL;
}
/* Initialize the __cache_line_size variable from the aux vector. */
- for (ElfW(auxv_t) *av = auxvec; av->a_type != AT_NULL; ++av)
+ for (ElfW (auxv_t) * av = auxvec; av->a_type != AT_NULL; ++av)
switch (av->a_type)
{
case AT_DCACHEBSIZE:
- {
- int *cls = & __cache_line_size;
- if (cls != NULL)
- *cls = av->a_un.a_val;
- }
- break;
+ {
+ int *cls = &__cache_line_size;
+ if (cls != NULL)
+ *cls = av->a_un.a_val;
+ }
+ break;
}
-
+#ifdef SHARED
+ /* Resolve and initialize function pointers for VDSO functions. */
+ _libc_vdso_platform_setup ();
+#endif
return generic_start_main (stinfo->main, argc, ubp_av, auxvec,
stinfo->init, stinfo->fini, rtld_fini,
stack_on_entry);
# include <errno.h>
+# ifdef SHARED
+# define INLINE_VSYSCALL(name, nr, args...) \
+ ({ \
+ __label__ out; \
+ __label__ iserr; \
+ INTERNAL_SYSCALL_DECL (sc_err); \
+ long int sc_ret; \
+ \
+ if (__vdso_##name != NULL) \
+ { \
+ sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, nr, ##args); \
+ if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
+ goto out; \
+ if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
+ goto iserr; \
+ } \
+ \
+ sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
+ if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
+ { \
+ iserr: \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
+ sc_ret = -1L; \
+ } \
+ out: \
+ sc_ret; \
+ })
+# else
+# define INLINE_VSYSCALL(name, nr, args...) \
+ INLINE_SYSCALL (name, nr, ##args)
+# endif
+
+# ifdef SHARED
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+ ({ \
+ __label__ out; \
+ long int v_ret; \
+ \
+ if (__vdso_##name != NULL) \
+ { \
+ v_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
+ if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
+ || INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
+ goto out; \
+ } \
+ v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
+ out: \
+ v_ret; \
+ })
+# else
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+ INTERNAL_SYSCALL (name, err, nr, ##args)
+# endif
+
+# define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
+ ({ \
+ long int sc_ret = ENOSYS; \
+ \
+ if (__vdso_##name != NULL) \
+ sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
+ else \
+ err = 1 << 28; \
+ sc_ret; \
+ })
+
+/* List of system calls which are supported as vsyscalls. */
+# define HAVE_CLOCK_GETRES_VSYSCALL 1
+# define HAVE_CLOCK_GETTIME_VSYSCALL 1
+
+/* Define a macro which expands inline into the wrapper code for a VDSO
+ call. This use is for internal calls that do not need to handle errors
+ normally. It will never touch errno.
+ On powerpc a system call basically clobbers the same registers like a
+ function call, with the exception of LR (which is needed for the
+ "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal
+ an error return status). */
+# define INTERNAL_VSYSCALL_NCS(funcptr, err, nr, args...) \
+ ({ \
+ register void *r0 __asm__ ("r0"); \
+ register long int r3 __asm__ ("r3"); \
+ register long int r4 __asm__ ("r4"); \
+ register long int r5 __asm__ ("r5"); \
+ register long int r6 __asm__ ("r6"); \
+ register long int r7 __asm__ ("r7"); \
+ register long int r8 __asm__ ("r8"); \
+ register long int r9 __asm__ ("r9"); \
+ register long int r10 __asm__ ("r10"); \
+ register long int r11 __asm__ ("r11"); \
+ register long int r12 __asm__ ("r12"); \
+ LOADARGS_##nr (funcptr, args); \
+ __asm__ __volatile__ \
+ ("mtctr %0\n\t" \
+ "bctrl\n\t" \
+ "mfcr %0" \
+ : "=&r" (r0), \
+ "=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \
+ "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \
+ : ASM_INPUT_##nr \
+ : "cr0", "ctr", "lr", "memory"); \
+ err = (long int) r0; \
+ (int) r3; \
+ })
+
# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...) \
({ \
register long int r10 __asm__ ("r10"); \
register long int r11 __asm__ ("r11"); \
register long int r12 __asm__ ("r12"); \
- LOADARGS_##nr(name, args); \
+ LOADARGS_##nr(name, args); \
__asm__ __volatile__ \
("sc \n\t" \
"mfcr %0" \
# undef INTERNAL_SYSCALL_ERRNO
# define INTERNAL_SYSCALL_ERRNO(val, err) (val)
-# define LOADARGS_0(name, dummy) \
+# define LOADARGS_0(name, dummy) \
r0 = name
# define LOADARGS_1(name, __arg1) \
long int arg1 = (long int) (__arg1); \
- LOADARGS_0(name, 0); \
+ LOADARGS_0(name, 0); \
extern void __illegally_sized_syscall_arg1 (void); \
if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 4) \
__illegally_sized_syscall_arg1 (); \
#ifdef __ASSEMBLER__
/* This seems to always be the case on PPC. */
-#define ALIGNARG(log2) log2
+# define ALIGNARG(log2) log2
/* For ELF we need the `.type' directive to make shared libs work right. */
-#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
-#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
+# define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
+# define ASM_SIZE_DIRECTIVE(name) .size name,.-name
-#endif /* __ASSEMBLER__ */
+#endif /* __ASSEMBLER__ */
+
+/* This version is for kernels that implement system calls that
+ behave like function calls as far as register saving.
+ It falls back to the syscall in the case that the vDSO doesn't
+ exist or fails for ENOSYS */
+#ifdef SHARED
+# define INLINE_VSYSCALL(name, nr, args...) \
+ ({ \
+ __label__ out; \
+ __label__ iserr; \
+ INTERNAL_SYSCALL_DECL (sc_err); \
+ long int sc_ret; \
+ \
+ if (__vdso_##name != NULL) \
+ { \
+ sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, sc_err, nr, ##args); \
+ if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
+ goto out; \
+ if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
+ goto iserr; \
+ } \
+ \
+ sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
+ if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
+ { \
+ iserr: \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
+ sc_ret = -1L; \
+ } \
+ out: \
+ sc_ret; \
+ })
+#else
+# define INLINE_VSYSCALL(name, nr, args...) \
+ INLINE_SYSCALL (name, nr, ##args)
+#endif
+
+#ifdef SHARED
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+ ({ \
+ __label__ out; \
+ long int v_ret; \
+ \
+ if (__vdso_##name != NULL) \
+ { \
+ v_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
+ if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
+ || INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
+ goto out; \
+ } \
+ v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
+ out: \
+ v_ret; \
+ })
+#else
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+ INTERNAL_SYSCALL (name, err, nr, ##args)
+#endif
+
+/* This version is for internal uses when there is no desire
+ to set errno */
+#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...) \
+ ({ \
+ long int sc_ret = ENOSYS; \
+ \
+ if (__vdso_##name != NULL) \
+ sc_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args); \
+ else \
+ err = 1 << 28; \
+ sc_ret; \
+ })
+
+/* List of system calls which are supported as vsyscalls. */
+#define HAVE_CLOCK_GETRES_VSYSCALL 1
+#define HAVE_CLOCK_GETTIME_VSYSCALL 1
+
+/* Define a macro which expands inline into the wrapper code for a system
+ call. This use is for internal calls that do not need to handle errors
+ normally. It will never touch errno. This returns just what the kernel
+ gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set)
+ the negation of the return value in the kernel gets reverted. */
+
+#define INTERNAL_VSYSCALL_NCS(funcptr, err, nr, args...) \
+ ({ \
+ register void *r0 __asm__ ("r0"); \
+ register long int r3 __asm__ ("r3"); \
+ register long int r4 __asm__ ("r4"); \
+ register long int r5 __asm__ ("r5"); \
+ register long int r6 __asm__ ("r6"); \
+ register long int r7 __asm__ ("r7"); \
+ register long int r8 __asm__ ("r8"); \
+ LOADARGS_##nr (funcptr, args); \
+ __asm__ __volatile__ \
+ ("mtctr %0\n\t" \
+ "bctrl\n\t" \
+ "mfcr %0\n\t" \
+ "0:" \
+ : "=&r" (r0), \
+ "=&r" (r3), "=&r" (r4), "=&r" (r5), \
+ "=&r" (r6), "=&r" (r7), "=&r" (r8) \
+ : ASM_INPUT_##nr \
+ : "r9", "r10", "r11", "r12", \
+ "cr0", "ctr", "lr", "memory"); \
+ err = (long int) r0; \
+ (int) r3; \
+ })
#undef INLINE_SYSCALL
register long int r6 __asm__ ("r6"); \
register long int r7 __asm__ ("r7"); \
register long int r8 __asm__ ("r8"); \
- LOADARGS_##nr(name, args); \
+ LOADARGS_##nr (name, ##args); \
__asm__ __volatile__ \
("sc\n\t" \
"mfcr %0\n\t" \
(int) r3; \
})
#define INTERNAL_SYSCALL(name, err, nr, args...) \
- INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
+ INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args)
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) long int err
projects / platform / upstream / glibc.git / commitdiff